Kiboka camera bag by Gura Gear
Bought mine about 6 months ago...use it all the time for local trips and traveled to St. Kitts and Finland by plane...carry on compliant and the ability to convert to/from a back pack makes it very flexible.
Also have a Fast pack 350 and a top load Tamrac backpack but the Kiboka holds more equipment and is easier to use/keep organized.
'I look to the future because that's where I'm going to spend the rest of my life.' George Burns (1896 - 1996)